I’ve been noticing this behavior for a few months now. At first I thought it was due to my error pin, but after closely eying over the issue, it’s definitely a bug.
After clicking on the BW extension to launch the app, the UI is visible with pin input fielf. If the user starts typing their PIN immediately during this window, the I-beam cursor jumps back two positions, silently dropping the first two characters entered. This results in an incorrect PIN being submitted
Multiple browser: FF, Librewolf